出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The present status of neutron beam facilities above 20 MeV is reviewed. Presently, two main techniques
for neutron production at these energies are used; white beams and quasi-monoenergetic
beams. The performances of these two techniques are discussed, as well as the use of such facilities
for measurements of nuclear data for fundamental and applied research. Recently, two novel
ideas on how to produce extremely intense neuton beams in the 100-500 MeV range have been
proposed. Decay in flight of beta-delayed neutron-emitting nuclei could provide beam intensities
five orders of magnitudes larger than present facilities. A typical neutron energy spectrum would
be essentially mono-energetic, i.e., the energy spread is about 1 MeV with essentially no lowenergy
tail. A second option would be to produce beams of 6He and dissociate the 6He nuclei
into α particles and neutrons. The basic features of these concept are outlined, and the potential
for improved nuclear data research is discussed.
